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The real power problem is how to use less of it

From
Bryn Glover, Kirkby Malzeard, North Yorkshire, UK

It was very interesting to read Mark Lynas on the Union of Concerned Scientists' change of policy over nuclear fission power (24 November, p 24). I am, though, concerned that he did not find space to mention the relative contributions to global power use from the many different sources. He thereby implied equivalence between them that does not exist.

It is difficult to find precise numbers and sources disagree. It seems that humanity consumes some 200 million gigawatt-hours of power a year and about 90 per cent comes from fossil fuels, with fission and renewables making up the rest. …